add Hisilicon ufs driver code.
Signed-off-by: NLi Wei <liwei213@huawei.com>
Signed-off-by: NGeng Jianfeng <gengjianfeng@hisilicon.com>
Signed-off-by: NZang Leigang <zangleigang@hisilicon.com>
Signed-off-by: NYu Jianfeng <steven.yujianfeng@hisilicon.com>
Tested-by: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>